Title: Spin dynamics in the spacer of an interlayer-coupled Fe/Fe0.57Si0.43/Fe trilayer probed with nuclear resonant scattering of synchrotron radiation
Authors: Planckaert, Nikie ×
L'abbe, C
Croonenborghs, B
Callens, R
Laenens, Bart
Vantomme, André
Meersschaut, J #
Issue Date: Oct-2008
Publisher: Published by the American Physical Society through the American Institute of Physics
Series Title: Physical Review B, Condensed Matter and Materials Physics vol:78 issue:14
Article number: 144424
Abstract: Using nuclear resonant scattering of synchrotron radiation, we investigated the origin of the interlayer coupling in Fe/Fe0.57Si0.43/Fe multilayers. The sensitivity of the technique to dynamical processes on a nanosecond timescale and the choice of different isotopes during the growth of the heterostructure allowed us to selectively probe the temperature dependence of the spin dynamics in the spacer layer. Combining these results with macroscopic magnetization measurements, it is shown that the static magnetic ordering in the Fe0.57Si0.43 spacer layer leads to the suppression of the interlayer coupling at low temperatures. Above 150 K, fluctuating magnetic Fe moments in the Fe0.57Si0.43 spacer with characteristic frequencies in the MHz regime give rise to a biquadratic interlayer coupling between the iron layers.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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